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MCP1703T-3302E/CB

MCHPMCP1703T-3302E/CB

Microchip Technology
Linear Voltage Regulator IC Positive Fixed 1 Output 250mA SOT-23A-3
NRND25,069 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The MCP1703T-3302E/CB is a fixed 3.3V low dropout (LDO) linear regulator designed for low-power and battery-operated applications. It features an extremely low quiescent current of 2.0uA typical, helping to maximize battery life in standby modes. With an input voltage range up to 16V and 250mA of output current, it provides a stable power rail for microcontrollers and sensors.

Why Choose This Part

The primary benefit of this regulator is its 2.0uA quiescent current, which is significantly lower than standard LDOs. It also offers integrated short-circuit and overtemperature protection within a compact SOT-23A-3 package. The 16V maximum input capability allows for use with varied multi-cell battery configurations or unregulated wall adapters.

Applications

Battery-Powered Smoke Detectors
Provides a steady 3.3V rail from battery sources while maintaining minimal standby current draw.
Smart Battery Packs
Regulates internal monitoring electronics without significantly impacting the self-discharge rate of the pack.
Solar-Powered Remote Sensors
Utilizes the low 2.0uA quiescent current to remain efficient during low-light conditions where energy harvesting is minimal.
Microcontroller Power Supply
Delivers up to 250mA for active MCU tasks while protecting the system with short-circuit and overtemperature features.

Key Specifications

PSRR 44dB (100Hz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Current - Output 250mA
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 16V
Voltage Dropout (Max) 0.725V @ 250mA
Supplier Device Package SOT-23A-3
Current - Quiescent (Iq) 5 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

To implement this part, place a minimum of 1uF ceramic, tantalum, or aluminum electrolytic capacitor on both the input and output pins for stability. Ensure the SOT-23A footprint matches your PCB layout, noting that pinouts can vary between different MCP1703 package suffixes. No external resistors are required as this is a fixed 3.3V output device.

MCP1703 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number PSRR Package Temp Range Voltage Dropout (Max) Output V Stock
MCP1703T-3302E/CB (this part) 100Hz 3-236 -40degC ~ 125degC 0.725V 3.3V 25,069
MCP1703AT-3302E/CBVAO 100Hz 3-236 -40degC ~ 125degC .. 0.725V 3.3V 2,447
MCP1703A-5002E/DBVAO 100Hz 4-261 -40degC ~ 125degC 0.65V 5V 1,858
MCP1703AT-3302E/MBVAO 100Hz TO-243AA -40degC ~ 125degC .. 0.525V 3.3V 555
Also available as: MCP1703AT-5002E/MBVAO, MCP1703AT-5002E/CBVAO, MCP1703AT-3302E/DB, MCP1703-3302E/DB, MCP1703T-3302E/DB

Also Consider

MCP1700T-3302E/TT MCHPMicrochip Technology - Offers an even lower quiescent current of 1.6uA but with a lower maximum input voltage of 6V.
XC6206P332MR-G Torex Semiconductor - Commonly used low-quiescent LDO with a similar 1uA-2uA standby current for low-voltage applications.